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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test DocumentL10n Telemetry</title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
<script type="application/javascript">
"use strict";
const { BrowserTestUtils } = ChromeUtils.import(
"resource://testing-common/BrowserTestUtils.jsm"
);
SimpleTest.waitForExplicitFinish();
function countValues(snapshot, key) {
if (!snapshot.hasOwnProperty(key)) {
return 0;
}
let values = snapshot[key].values;
return Object.values(values).reduce((sum, n) => sum + n, 0);
}
(async function() {
let histogram = Services.telemetry
.getKeyedHistogramById("L10N_DOCUMENT_INITIAL_TRANSLATION_TIME_US");
let snapshot = histogram.snapshot();
// In some cases the test runs before first window is localized.
// We just want to ensure that we didn't register more than 1
// first window telemetry.
let firstWindowCount = countValues(snapshot, "browser_first_window");
is(firstWindowCount < 2, true);
histogram.clear();
// Open a new window
let win = await BrowserTestUtils.openNewBrowserWindow({
waitForTabURL: "about:blank",
});
// Telemetry in testing is flaky and when landing this test
// we saw cases where the snapshot did not contain the new
// window telemetry at this moment.
//
// We're going to use `waitForCondition` to test for
// the telemetry to be eventually recorded.
BrowserTestUtils.waitForCondition(() => {
snapshot = histogram.snapshot();
// We want to make sure that since we cleared histogram
// just one new window of either type has been opened.
let browserWindowsCount =
countValues(snapshot, "browser_new_window") +
countValues(snapshot, "browser_first_window");
return browserWindowsCount == 1;
});
// Open preferences in a new tab
let tab = BrowserTestUtils.addTab(
win.gBrowser,
"about:preferences"
);
await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
// Similarly to the above, we've seen cases where the telemetry
// was not present right after the tab was opened, so
// we'll use `waitForCondition` here.
BrowserTestUtils.waitForCondition(() => {
snapshot = histogram.snapshot();
return countValues(snapshot, "about:preferences") == 1;
});
await BrowserTestUtils.closeWindow(win);
SimpleTest.finish();
})();
</script>
</head>
<body>
</body>
</html>
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